The question is a bit misleading. Babies don't stop growing "baby hairs" at a specific age, but rather their fine, downy hair (also called lanugo or vellus hair) is replaced by their permanent, thicker hair. Here's a breakdown:
Understanding Baby Hair Transition
It's not about stopping growth but rather a transition from one type of hair to another. The fine baby hair they have at birth, sometimes referred to as vellus hair, starts to fall out, and is gradually replaced by their permanent hair, which is thicker and often darker.
Timeline of Hair Development
| Stage | Description | Timeframe |
|---|---|---|
| Baby Hair | Fine, downy hair babies are born with. | At birth |
| Transition | Baby hair starts to fall out, replaced by permanent hair. | Around six months, but can vary. |
| Childhood Hair | The permanent, thicker hair that replaces baby hair. | Usually by two years of age. |
- Reference Information: According to the reference, the appearance of a child's permanent hair usually begins around the six-month mark. However, the reference also mentions that a child might start growing their permanent hair as early as three months or as late as 18 months. Every child is different and it's healthy for children to grow big-kid hair any time before two years of age.
Key Points to Consider
- Individual Variation: The exact timing varies widely. Some babies might transition sooner, while others take longer.
- No Specific "Stop" Age: It's not about ceasing hair growth, but about the replacement of hair.
- Healthy Development: A transition by the age of two is considered within the normal range of development.
Therefore, instead of stopping the growth of "baby hairs", they fall out as the new hair grows. It generally occurs before the age of two.
